Shes the perfect "fall guy" --- carefully selected to do the carnage (under the guidance of the rest of the board) so that people can have someone to hate during this transitional period, a scapegoat so to speak. The goal being to eliminate free speech and prime reddit for mainstream advertising. Bend over people! They knew that whoever is going to do it needs to be foolish, have strong beliefs in limiting free speech and easily manageable during this phase (honestly, shes the perfect choice!). Once it's over they can fire this "interim CEO", keep the changes and be the white knight that killed the "troll". Problem is, I think they underestimated the power of community here and really pissed off a lot of users in the process.

/u/btcprox this is my theory --- I may be wrong but it seems plausible.